One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,5)(3,8,4,7)(11,15)(14,16)(18,22)(23,28)(24,29)(30,32)(33,34,38,41)(35,42,39,36)(37,45,46,40)(43,44,47,48)(1,3,6,4)(2,7,5,8)(9,10,13,12)(11,14,15,16)(19,25)(23,28)(26,31)(30,32)(35,39)(36,42)(43,47)(44,48)(9,10,13,12)(11,14,15,16)(17,18,21,22)(19,23,25,28)(20,24,27,29)(26,30,31,32)(33,35,38,39)(34,36,41,42)(37,43,46,47)(40,44,45,48)(1,4,6,3)(2,7,5,8)(9,11)(10,14)(12,16)(13,15)(17,19,21,25)(18,23,22,28)(20,26,27,31)(24,30,29,32)(33,36)(34,39)(35,41)(37,44)(38,42)(40,47)(43,45)(46,48)(1,5,6,2)(3,8,4,7)(9,12,13,10)(11,16,15,14)(17,20,21,27)(18,24,22,29)(19,26,25,31)(23,30,28,32)(33,37)(34,40)(35,43)(36,44)(38,46)(39,47)(41,45)(42,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.